Medical sterile container is a common medical equipment, mainly used for the storage of instruments in the process of packaging, sterilization, transit, storage, etc.
The sterilization box as a whole is made of anodized aluminum, which provides anti-pressure, moisture-proof and dust-proof protection during sterilization, transportation, transit and use. The sterilization container has good sealing performance, and the sealing ring is made of silicone material:. The safety lock device is locked once to avoid misoperation.
Sterile Container,Sterilization Box,sanitizing box,sterilizer box Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.aomedortho.com
Grafting Seedlings and Cultivation Techniques of Watermelons
Grafting watermelon cultivation is currently the most effective method to combat watermelon wilt disease, a common and destructive plant illness. This technique not only helps prevent disease but also enhances plant vigor and productivity. Here's a detailed guide on grafting watermelon seedling techniques and subsequent cultivation practices.
First, the process of raising grafted watermelon seedlings involves several key steps. The first step is selecting suitable scion and rootstock. Local varieties like October Pu and Japanese Round Pu are commonly used as rootstocks. These are sown one week earlier than the scions. Before sowing, both seeds are soaked, disinfected, and allowed to germinate. A nutrient-rich soil mix that is loose, fertile, and free from pathogens is essential for the nursery. Rootstocks are planted in individual pots, while the scions are sown directly on the seedbed. It's important to ensure that the seedlings do not overlap once they emerge, so their cotyledons can spread freely.
Next comes the grafting process. The best time to graft is when the rootstock has developed its first true leaves and the cotyledons have fully opened. Prior to grafting, the seedbed should be watered every 3-4 days. Ideal conditions for grafting include a temperature around 25°C and a relative humidity of over 90%. One to two days before grafting, a protective spray containing fungicides such as chlorothalonil or carbendazim is applied. During grafting, the top growth point of the rootstock is carefully removed with a sharp blade. A bamboo stick is then inserted into the cut, and the scion’s stem is inserted at an angle of approximately 30 degrees, about 0.6–0.8 cm deep. The scion is prepared by cutting it 1 cm below the cotyledons, forming a wedge shape, and immediately inserted into the rootstock’s bamboo stick to complete the graft.
After grafting, proper management of the seedbed is crucial. The healing period of the graft union usually takes 8–10 days. During this time, the daytime temperature should be kept between 26–28°C, and nighttime temperatures around 20–22°C. After 4–5 days, the seedbed should be gradually ventilated and cooled down. By day 7, the daytime temperature can be reduced to 23–24°C, and nighttime temperatures to 18–20°C. After grafting, the seedbed should be watered once, and a small greenhouse structure is placed over it. For the next 3–5 days, it should remain sealed and shaded to maintain high humidity (over 90%). The first three days after grafting require full shading, and from day four onward, light exposure should be gradually increased.
Once the graft has healed, the humidity should be reduced, and the temperature difference between day and night should be increased to strengthen the seedlings. Typically, daytime temperatures should be 22–24°C, and nighttime temperatures 10–15°C. Any signs of disease should be treated promptly, and any new leaves growing from the rootstock should be removed to encourage the growth of the grafted scion.
In addition to seedling care, grafted watermelon cultivation requires some adjustments compared to traditional methods. First, planting density can be slightly reduced, allowing for better air circulation and easier vine management. Grafted watermelons are often pruned to 3–4 vines, which helps increase fruit set. A typical planting rate is around 450 plants per acre. Second, fertilizer application should be adjusted—especially nitrogen levels. Reducing nitrogen by about 20% helps control excessive vine growth and promotes more balanced development. Finally, pest and disease control should focus on other common issues, as grafting effectively prevents wilt disease. However, it's important to avoid burying the graft interface during planting to ensure proper healing and long-term success.